Is there physical damage to the phone? You may wanna try and do a master reset. Just set the phone back to it's factory settings. You won't lose any information. Just the ringtone and the wall paper will be as if you removed the phone out of the box brand new. To do a master reset:

From the main screen, select Menu..

Scroll to and select Settings.

Scroll to and select Rest. factory sett..

Enter the Security code..

NOTE: The default password is 12345.

Select OK.

Also, besure once a day your shut the nokia off for 10-30 seconds. Just to refresh, and keep it working top notch.

Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.

1 - Switch on your Nokia 6270 without any sim card.
2 - Don't bother as to what is displayed on your Nokia 6270.
3 - Compose #pw+CODE+1#.
4 - The Nokia 6270 would then display the message "SIM Restriction Off" and will be unlocked!

Note :For Nokia 6270 mobile phones locked to the network Fido or Rogers in Canada follow these instructions :
1 - Switch on your Nokia 6270 without any sim card.
2 - Don't bother as to what is displayed on your Nokia 6270.
3 - Compose #pw+CODE+7#.
4 - The Nokia 6270 would then display the message "SIM Restriction Off" and will be unlocked!

The letter p appears if you press the button star(*) three times quickly
The letter w appears if you press the button star(*) four times quickly
The symbol + appears if you press the button star(*) two times quickly
The CODE you need to enter is the unique unlock code for your Nokia 6270

Your display circuit is broken, even if the LCD-panel,
seems to be ok the display is damaged.
This is a very common problem in Nokia phones.
The only way to fix this is to change the display.
You need a T-6 Torx Skrewdriver to do the job.
You can find displays for fair price at :
www.mytrendyphone.com
This is your solution! Please vote!

Your phone's LCD is damaged by some reasons (could be the heat produced while charging) or is loose.
If ot is still in place,the wayto have it back is to buy a new LCD. A ratr for this will be mush appreciated...